Abstract: The Y12F aircraft is a brand-new commuter aircraft of Part 23 manufactured by HAFEI Aviation Industry. It is developed on the basis of the original Y12 series aircraft, and is also the largest commuter aircraft in the world at present. The Y12F aircraft is the first civil aircraft type in China to be certificated and approved by the FAA and CAAC simultaneously. The radome is usually located in the nose of the aircraft. It is vulnerable to lightning strikes in bad weather and may cause catastrophic accidents. Radome is the key part of aircraft structure lightning protection design and lightning protection compliance demonstration. Taking the compliance demonstration of Y12F aircraft radome lightning protection as an example, this paper introduces the relevant airworthiness requirements, the design idea, demonstration method, as well as the specific test process and results of the radome lightning protection. The relevant experiences and lessons can be used for reference by the applicant and the authority in the civil aircraft radome lightning protection design, compliance demonstration, and the airworthiness certification. It has important reference significance.

Key words: aircraft, composite, radome, lightning protection, compliance demonstration, airworthiness